body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial;
    background: linear-gradient(135deg,#667eea 0%,#764ba2 100%);
    margin:0;
    height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
}
#app{
    background:#fff;
    padding:40px 50px;
    border-radius:12px;
    box-shadow:0 10px 30px rgba(0,0,0,.2);
    width:320px;
    max-width:90%;
}
h1{
    margin:0 0 20px;
    text-align:center;
    color:#333;
}
h2{
    margin:0 0 15px;
    font-size:20px;
    color:#444;
}
input{
    width:100%;
    padding:10px 12px;
    margin:6px 0 16px;
    border:1px solid #ccc;
    border-radius:6px;
}
button{
    width:100%;
    padding:10px;
    border:none;
    border-radius:6px;
    font-size:16px;
    cursor:pointer;
}
button[type="submit"]{
    background:#667eea;
    color:#fff;
}
button[type="button"]{
    background:none;
    color:#667eea;
    margin-top:10px;
}
p{
    margin:5px 0;
    font-size:14px;
    text-align:center;
}